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CSS inversion. CSS3 filters: changing images using styles

This can be done using CSS without any scripts or pre-processing. Yes, technology does not stand still :) The implementation is very simple and does not even require the use of any form of SVG, which is popular nowadays.

How to recolor the font color in a photo

If you carefully read MDN you can roughly understand the blending modes and see the differences between them, although they are almost all the same. Having white text above the image gives us a result that is an inverted image, where the text overlaps it. For simple black and white images, black in the original image becomes white where we have white text above it, and white in the original image becomes black when we have white text above it.

For example, let's take a primitive HTML code:

CSS
HTML site

And add some more primitive CSS to it:

Background ( background: url(super_cat.jpg); width:800px; height:450px; ) h2 ( color: #FFF; mix-blend-mode: difference; font: 900 120px/120px Arial; text-align: center ) span ( display:block; font-size:80px )

It turned out great even without Photoshop programs! Both text and image can be changed and the effect is maintained without the need for any JavaScript or any changes to CSS or SV masks. But this is suitable for simple images. With more complex ones, it is necessary to apply additional filters and mix them.

For example, we can add the following CSS filter to our h2 tag to help:

H2 ( filter: invert(1) grayscale(1) contrast(9) )

Options sharing filters are limited only by your imagination and taste of style.

The invert() function inverts the colors in an image. Its effect is similar to turning a photograph into a negative.

Syntax

filter: invert(<значение>);

Designations

	Description	Example
<тип>	Indicates the type of the value.	<размер>
A && B	The values must be output in the order specified.	<размер> && <цвет>
A \| B	Indicates that you need to select only one value from the proposed ones (A or B).	normal \| small-caps
A \|\| B	Each value can be used independently or together with others in any order.	width \|\| count
	Groups values.	[ crop \|\| cross ]
*	Repeat zero or more times.	[,<время>]*
+	Repeat one or more times.	<число>+
?	The specified type, word, or group is optional.	inset?
(A, B)	Repeat at least A, but no more than B times.	<радиус>{1,4}
#	Repeat one or more times separated by commas.	<время>#

Values

A value of 0 leaves the image as is. A value of 100% or 1 completely inverts the colors of the picture. Values from 0% to 100% or 0 to 1 partially invert the colors.

A negative value is not allowed. An empty value is treated as 0.

Sandbox

img ( filter: invert((( playgroundValue ))% ); )

Example

invert()

Result this example shown in Fig. 1.

Rice. 1. Invert color. On the left is the original, on the right is a photo with a filter.

Note

Chrome before version 53, Opera before version 40, and Safari before version 9.1 support the -webkit-filter property.

Specification

Each specification goes through several stages of approval.

Recommendation - The specification has been approved by the W3C and is recommended as a standard.
Candidate Recommendation ( Possible recommendation) - the group responsible for the standard is satisfied that it meets its goals, but requires help from the development community to implement the standard.
Proposed Recommendation Suggested Recommendation) - at this stage the document is submitted to the W3C Advisory Council for final approval.
Working Draft - A more mature version of a draft that has been discussed and amended for community review.
Editor's draft ( Editorial draft) - a draft version of the standard after changes were made by the project editors.
Draft ( Draft specification) - the first draft version of the standard.

Browsers

The following notations are used in the browser table.

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How is the casino rating compiled and who gets there?

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availability of a license from the gambling regulator and the chosen jurisdiction for registration;
platform security, which guarantees the confidentiality of data and payment information;
choosing licensed software from reliable providers whose work cannot be interfered with;
availability of a Russian-language version for greater convenience for users from Russia and CIS countries;
support service, including its work schedule, speed of responses, quality of problem solving;
withdrawal of money without additional delays or verifications, as well as options for receiving money and the speed of processing transactions;
bonus programs for new and regular users, the presence of tournaments, lotteries, periodic promotions;
payment systems that affect the convenience of customers to replenish their accounts and withdraw winnings.

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What is a licensed casino?

Casino rating , indicating the honesty and transparency of the gaming platforms, may consist exclusively of establishments with valid operating licenses. Legal clubs are required to be vetted by regulators and comply with all their rules in order to receive permission.

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How is casino fairness determined?

It is quite difficult to independently assess the integrity of a gaming club, which is due to the amount of available resources and knowledge. Before including establishments inrating of honest casinos, analysts conduct a thorough check of many factors:

regions from which players are accepted, since prohibited jurisdictions speak volumes;
withdrawal limits limiting one-time transactions, as well as the daily, weekly and monthly amount of transactions;
availability of information about KYC and AML, which indicates compliance with the requirements of legislation on the honesty and legality of the origin of money;
a reputation confirming the honesty and reliability of the club’s work and the absence of high-profile scandals or problems;
duration of work, allowing you to fully appreciate the story online resource, including all advantages and disadvantages;
the presence of a regulator and compliance with its rules, which increases the chances of fair operations.

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Types of slot machines

The number of slots, machines and other types of gambling entertainment says a lot about the establishment. Some clubs cooperate only with a few software providers, but receive popular and new game offers from them, while others are expanding their network of partnership agreements and inviting a huge number of brands to cooperate. The more machines are presented on the gaming platform, the easier it is for the client to choose the slot he likes.

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Bonus policy

Create a casino rating impossible without taking into account the bonus policy. All gaming clubs use promotions and gifts to attract new people and retain them. existing clients. But some establishments act quite cunningly, creating hidden conditions for wagering or accruals, setting unrealistic wagering conditions ranging from x60-100, which are almost impossible to fulfill.

The standard set of incentives consists of the following categories:

No deposit bonus for welcoming new clients - awarded for address confirmations Email and phone numbers. As a reward, they use free money or free spins on slot machines with a mandatory wagering requirement.
Registration gift - free spins or multipliers of the account replenishment amount by 1-5 deposits from the moment of creating a personal profile. The exact bonus size and maximum limits are set individually by each club.
Loyalty program - various systems of user statuses that affect the size of weekly cashback, the availability of personal terms of service, individual gifts, favorable exchange rates for domestic currency and much more.
Promotional codes are periodic promotions from gaming clubs that give out gift certificates for free spins, no deposits or account multipliers for everyone.

Russian speaking casinos

Composing rating of the best casinos 2020, the presence of the Russian language on the platform is taken into account. The Russian-language interface allows users from Russia, Belarus, Ukraine and CIS countries to easily understand registration, login, account replenishment and other features of the platform. This also confirms that the establishment is focused on Russian-speaking users, offering them unique bonuses and support.

The work of the support service is taken into account. Most gambling clubs provide assistance to clients exclusively on English language, which complicates the communication process. You need to use a translator or contact knowledgeable people to make a request and understand the support response. Therefore, the rating includes only those online clubs that advise clients in support chats and by phone in Russian.

The Russian-language interface in the casino will allow you to understand the user rules of the platform without additional effort, study bonus offers and the features of their accruals, wagering, and take part in tournaments and lotteries without any doubts about the correctness of the actions.

Casino with fast withdrawals

Particular attention is paid to the speed of payouts in online casinos. Some clubs offer withdrawal of funds to bank cards and electronic wallets within a few hours, and for VIP clients requests are processed instantly. Others use manual processing of applications on business days according to a special schedule, so payments may be delayed up to 1-3 business days from the date of application. To save users from long waits, we createdcasino rating with fast withdrawal.

It consists exclusively of those institutions that promptly consider all applications and do not create obstacles to receiving money. Not only the speed of transfers is taken into account, but also the absence of problems when requesting large payments or money transfers after winning the jackpot or big jackpot. Only honest establishments can guarantee the fairness of payments and the absence of problems with payments.

An analysis of available payment systems for deposits and requests for money is also carried out. Standard sites support a minimal number of methods, but progressive clubs constantly analyze trends to integrate new technical solutions.

Main payment systems in online casinos:

bank cards MIR, MasterCard, Visa;
electronic wallets QIWI, Yandex, Webmoney, Neteller, Skrill and others;
mobile payments Beeline, MegaFon, MTS, TELE2;
Russian Internet banking;
popular cryptocurrencies, including Bitcoin, Ethereum, Litecoin.

User technical support service

An important factor that was taken into account in order to createrating of honest casinos- availability of customer support and the quality of its work. Reliable establishments take care of their own client base, so they organize special telephone lines, as well as online chats to promptly answer user questions and solve their problems.

To analyze support, analysts used phone lines, live chats and mail contacts. At different times of the day, site employees received various questions or requests to deal with technical problems. After this, the quality of their work was assessed, which included the following factors:

speed of response;
whether the consultant solves the problem and how long it takes;
literacy of answers and availability of Russian-speaking support staff.

If the casino does not have Russian-speaking operators, we recommend using online translator from Google to translate questions and answers from consultants.

conclusions

Before registering in an online club, you need to analyze the reliability and transparency of its work, as well as check its reputation and reviews online. Instead we suggest usingrating of honest casinos, compiled by experienced gamblers. Using their own experience, they rejected dozens of suspicious gaming clubs, leaving the best establishments of 2020 on the list.

Description

Adjusts the color or transparency parameters of an element, and also sets rotation.

Syntax

filter: progid:DXImageTransform.Microsoft.BasicImage(parameters)

Options

enabled Enables or disables the filter. The value true allows the filter to be used, false disables it. grayScale Colors are converted to shades of gray. 1 — gray colors, 0 — display original colors. invert Inverts the element's colors. 1 — invert colors, 0 — leave original colors. mask Sets what certain colors must be transparent. 1 — transparency is changed using the maskColor parameter, 0 — display original colors. mascColor Sets the color used as the element's content transparency mask. The color is specified in the format 0xAARRGGBB, where AA is hexadecimal value transparency, RR - red component, GG - green component, BB - blue component. mirror Mirrors the element. 1 — mirror horizontally, 0 — leave original. opacity Sets the transparency value. 0 — full transparency, 1.0 — opacity of the element. rotation Rotates an element. 0 - initial position, 1 - rotate 90° clockwise, 2 - rotate 180°, 3 - rotate 270°. xray Colors are converted to grayscale with inverted colors.

The parameters inside the filter are listed separated by commas in any order.

HTML5 CSS2.1 IE Cr Op Sa Fx

filter